Steam-boiler.



H. A. TUBES.

STEAM BOILER.

APPLICATION FILED SEPT. 26, 1912.

1,1 32,985. Patented Mar. 23, 1915.

2 SHEETSSHEET 1.

THE NORRIS PETERS C0,, FHOTOLITHO" WASHINGTON. D. C

H. A. TUBBS.

STEAM BOILER.

APPLICATION FILED $EPT. 2 6, 1912. 1,1 3&985, Patented Mar. 23, 1915..

2 SHEETSSHEET 2" "mane sra res new. :orrrca.

' HERBERT A. Teens, orroR'rLANn, uronreau.

stream-so ten.

To all whom it may concern:

Be it known that I, HERBERT A. TUBBs,a

apartment house and dwelling steam heating'systems in that steam may be generated thereby with an economical consumption of fuel and withouttheattention of an experienced engineer.

A further aim of the invention is-to provide for a more complete circulation of the water and a more complete utilization of the heat generated from" the burning fuel, and this is accomplished bysubjecting a certain volume of the-water to a high degree of heat and the remainder to a less degree of} heat in such manner that the first volume will be rapidly converted into steam and the-latter will rapidly-take its place.

' The invention also aims to provide a boiler and furnace which will be simple in construction and'not liable to get out of order and which will require little attention while in use.

WVith these and other objects in View the present invention consists in the combination and arrangement of parts as will be hereinafter more fully described and finally pointed out in the appended claims it being further understood that changes in the specific structure shown and described may be made within the scope of the claims, without departing from the spirit ofthe invention. I

In the accompanying drawings forming a part of this specification and in which like numerals of reference indicate similar parts in the several views: Figure 1 is a vertical longitudinal sectional view through a boiler and furnace constructed in accordance with the present invention. Fig. 2 is a vertical transverse sectional view on the line 2, 2 of Fig. 1. Fig. 3 is a similar view on the line 3,3 of Fig. 1. p

In the drawings, the numeral 1 indicates the rear wall of the furnace, 2 the sidewalls Specification of Letters Patent. Patgntefl 1W3}; 23 1915 Application filed September 26, 1912. Serial no. 722,503.

thereof, and 3 the. front wall. The top wall or'arch is indicated by the numeral 4.

The numeral 5 indicates a flue built at the rear of the furnace and the numeral 6 indicates a bridge wall which is located between the front and rear walls andextends from one side wall to the other, as shown in Fig. 3 of the drawings. The furnace is provided with a cement floor 7 which extends between the bridge wall 6 and the rear wall 1 and between the side walls 2, and supportedbetween the said bridge wall andthe front wall 8 is a grate 8. The fire box door of the furnace is indicated by the numeral 9 and is arranged in the frontwall 3 above the grate 8,.and the ash pit door,-indicated by the numeral 10 is located below the grate in the said front wall 3. I

The boiler embodying the present invention includes a forward tube 11 and a rear tube sheet12, and expanded at their ends in these tube sheets are water tubes 13 and steam tubes 14; and .15. The tubes 13 are arranged in staggered relation as shown in.

Figs. 2 and 3 ofthe drawings and the tubes 14"and 15' are located above thebank of water tubes, the tube 15'being of greater convex form, is provided with a peripheral flaring'rim 17 and a flange 18 which extends around the margin of the rim 17 and.

is secured by means of bolts 19 to the forward tube sheet 11 as illustrated in .Fig. 1 ofthe-drawings. A similar head 20 is se-f cured to the rear tubesheet. 12, and stays 21 are secured at their ends through the said heads16 and 20 and extend'through the water tubes 13 and "serve to brace the heads against the pressure within the boiler. 1

proper at a point substantially midway be-v 1 tween the ends thereof. A baffle plate 22 is supported by the bridge wall 6- and extends thereabove substantially in a vertical plane,

and the water tubes 13 extend through this baffle plate as illustrated in Fig. 1.. The upper edge of the baffle plate, however, terminates below the under sides of the steam tubes lat and 15, and it may be preferable to locate one or more series of the water tubes above the upper edge of the said plate as shown in the drawings, although this is optional. A steam outlet pipe 23 opens through the forward head 16 of the boiler and located upon the said head above this pipe is a pressure 24:. A water gage 25 is arranged upon the said head 16 below the outlet pipe 23.

From the foregoing it will be readily understood that the heat currents from the fuel upon the grate 8 pass upwardly in front of the balile plate 22 and around the forward portions of the water tubes 13, thereby heating the water in this portion of the tubes to a high degree of temperature. They then pass over the upper edge of the said plate as indicated by the arrows in Fig. 1 of the drawings and around the rear end portions of the tubes, a' ter which they pass up behind the rear head 20 of the boiler and out through the flue 5. It will be observed that the water tubes as well as the steam tubes are inclined downwardly and rearwardly and that the forward or upper ends of the water tubes are subjected to the highest degree of heat, the water in this portion of the water tubes being partially converted into steam before entering the steam tubes 1a and 15 which are above the normal Water level. In this manner, the water in the forward portions of the water tubes is rapidly converted into steam and the water in the rear portion thereof is heated to such degree as to insure of its quick passage into the forward end portions of the tubes to take the place of the water which has been subjected to the higher degree of temperature.

Having thus described my said invention, what I claim as new and desire to secure by United States Letters Patent is:

1. In a heating apparatus of the character described, a furnace including a bridge wall, a boiler having oppositely disposed boiler heads comprising an inner substantially flat sheet and an outer curved sheet having at its periphery an offset flange engaging directly the inner fiat sheet and detachably connected thereto, said inner sheets having tube openings therein, water tubes having their opposite ends held within said openings, stay bolts passing through said tubes and water heads, and secured to the outer face of the water heads, a relatively large steam tube projecting between the water heads substantially midway of the sides thereof, and a relatively small steam tube at opposite sides of the first mentioned steam tube and connecting with the water heads at its respective ends.

2. A boiler including oppositely disposed water heads, each comprising an outer plate having an outwardly directed securing flange, and an apertured inner plate secured to the flange of the outer plate, said plates located opposite one another, bolts to detachably secure said plates of the heads together, tubes having their ends fitted into said apertures, threaded stay rods extending through said tubes and heads, and nuts to secure said stay rods, as and in the manner set forth.

In testimony whereof I ailiX my signature, in presence of two witnesses.

HERBERT A. TUBES. Witnesses:

F. J. BADGLEY, FRANK D. Loonwoon.

Copies of this patent may be obtained for five cents each, by addressing the Commissioner of Patents,

Washington, D. C. 

